1. Place Value & Rounding Review

2. Place Value

3. For the number 2,641.25 : The 2 is in the ___ place. The 6 is in the ___ place. The 4 is in the ___ place. The 1 is in the ___ place. The 2 is in the ___ place. The 5 is in the ___ place.

4. Rounding Whole Numbers Use the term rounding digit - which means: When asked to round to the closest tens - your rounding digit is the second number to the left (ten's place) when working with whole numbers. Example: 345 the underlined 4 is the rounding digit.

5. Rounding Whole Numbers Use the term rounding digit - which means: When asked to round to the nearest hundred - the third place from the left is the rounding digit (hundreds place). Example: 345 the underlined 3 is the rounding digit.

6. Rules for rounding whole numbers Rule 1: Determine what your rounding digit is and look to the right side of it. If the digit is 0,1,2,3 or 4 do not change the rounding digit. All digits that are on the right hand side of the requested rounding digit will become 0.

7. Rules for rounding whole numbers 2.64 = 2.6 For example: The four is less than five so we will drop it.

8. Rules for Rounding whole numbers Rule 2. Determine what your rounding digit is and look to the right of it. If the digit is 5,6,7, 8 or 9, your rounding digit rounds up by one number. All digits that are on the right hand side of the requested rounding digit will become 0

9. Rules for rounding whole numbers 2.694 = 2.7 For example: The nine is more than five so we will add one to the rounding digit.

10. Rules for rounding decimal numbers When rounding numbers involving decimals, there are 2 rules to remember: Rule 1: Determine what your rounding digit is and look to the right side of it. If that digit is 4,3, 2 or 1, simply drop all digits to the right of it.

11. Rules for rounding decimal numbers For Example: if rounding to the nearest tenth of 6.422, the 4 becomes our rounding digit, the 2 to the right of it is less than 5, so we simply drop all the digits behind it. 6.422 to the nearest tenth is 6.4

12. Rules for rounding decimal numbers Rule 2: Determine what your rounding digit is and look to the right side of it. If that digit is 5, 6, 7, 8 or 9 add one to the rounding digit and drop all digits to the right of it.

13. Rules for rounding decimal numbers For Example: if rounding to the nearest tenth of 6.573, The 5 becomes our rounding digit, the 7 to the right of it is more than 5, so we simply add one to the rounding digit. 6.573 to the nearest tenth is 6.6